词块提取与分析.PDF

词块提取与分析 梁茂成 主要内容  语料库语言学中的词块  N-grams及其意义 赋码序列（tag sequence ）及其意义 研究案例说明及操作 语料库语言学中的词块 词的序列 常常没有独立的语法属性 频率信息和搭配强度很重要 自动发现的词块与直觉相符吗？ 语料库语言学中的词块 Chunks, lexical bundles, formulaic sequences, prefabricated chunks, idiomatic expressions… Studies in applied linguistics show: Native speakers… Advanced L2 learners… Studies in psycholinguistics show… Chunks are stored and retrieved as a whole N-grams及其意义 N-grams及其提取方法 N-grams与语言的地道性（idiomaticity） N-grams的局限 赋码序列及其意义 The rise in the oil price after 1979 was mainly responsible for the growth in the share of this group during the following three years . The decrease in the food price after 1990 was mainly due to the increase in the amount of food import . 赋码序列及其意义 The_AT rise_NN1 in_II the_AT oil_NN1 price_NN1 after_II 1979_MC was_VBDZ mainly_RR responsible_JJ for_IF the_AT growth_NN1 in_II the_AT share_NN1 of_IO this_DD1 group_NN1 during_II the_AT following_JJ three_MC years_NNT2 ._. The_AT decrease_NN1 in_II the_AT food_NN1 price_NN1 after_II 1990_MC was mainly_RR due_JJ to_TO the_AT increase_NN1 in_II the_AT amount_NN1 of_IO food_NN1 import_NN1 ._. 赋码序列及其意义 AT NN1 II AT NN1 NN1 II MC VBDZ RR JJ IF AT NN1 II AT NN1 IO DD1 NN1 II AT JJ MC NNT2 . AT NN1 II AT NN1 NN1 II MC was RR JJ TO AT NN1 II AT NN1 IO NN1 NN1 . 赋码序列及其意义 赋码序列及其意义 本族人语言中的赋码序列：“黄金 序列” 在词性赋码后的学习者作文文本中 匹配“黄金序列” 研究案例说明及操作 学习者作文中“黄金序列”的多少是否能够 预测其作文质量的高低？ If yes… If no… 研究案例说明及操作 Extract high-frequency 5-word tag sequences from NS Match these sequences against NNS essay texts Count the matches Correlate the matches with essay scores 启示：grammaticality 局限